On tethered headsets like the HTC Vive and Oculus Rift, you can use a program like Virtual Desktop, which mirrors your monitor on a giant 360-degree screen. But Marvel, an indie VR system currently raising money on Indiegogo, may be the first time I've seen someone take a crack at a mobile operating system.

The Marvel is basically two products: a VR headset that uses a mobile phone, and software that lets Android users run windowed versions of their apps in a 360-degree environment. The headset promises a few features that elevate it above your ordinary Google Cardboard. It's supposed to have an extraordinarily wide 180-degree field of view, while the standard VR headset has something like 110 degrees. It includes its own sensors to supplement the phone's standard motion-tracking capabilities, like the Gear VR does, as well as an NFC chip. There's a reference to "enhanced eye tracking," but that appears to be referring to those sensors, not a Tobii-like eye control interface.